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# Copyright 2023-present the HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from contextlib import contextmanager
import packaging.version
import torch
import transformers
@contextmanager
def gather_params_ctx(module: torch.nn.Module, modifier_rank: int = 0):
"""Call DeepSpeed GatheredParameters context manager if DeepSpeed is enabled, otherwise do nothing."""
if packaging.version.parse(transformers.__version__) >= packaging.version.parse("4.33.0"):
from transformers.integrations import is_deepspeed_zero3_enabled
else:
from transformers.deepspeed import is_deepspeed_zero3_enabled
if not is_deepspeed_zero3_enabled():
yield
return
import deepspeed
params_to_gather = module.parameters()
with deepspeed.zero.GatheredParameters(params_to_gather, modifier_rank=modifier_rank):
yield
return
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